Brake-shoe



W. GIBSON.

I BRAKE SHOE. APPLICATION FILED AUG-15, 1919,

1,349,1 7, PatentedAug.'10,1920.

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71767716886 3: fflven Z07:

. UNITED STATES PATENT OFFICE.

BRAKE-SHOE.

Application filed August 15, 1919.

To all whom it may concern:

Be it known that I, \VILLIAM GIBSON, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Brake- Shoes; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to brake shoes and has special reference to the class of brakeshoes which are provided with an inclosed metallic casing around a filling or body of frictional material for engagement with a wheel in braking.

The object of my invention is to provide a cheap, simple and eificient form of brakeshoe, wherein the sides or ends of such shoe will not out into or wear down the tread of the wheel on which it is used, and one in which such ends or sides will wear down evenly and uniformly with the filling of frictional material.

A still further object of the invention is to keep the metal of the casing or cap of the shoe from engaging the wheel when in use, so that when the shoe is worn down to such metal very little is left 'of the shoe and it then can be scrapped. v

To these ends my invention consists, generally stated, in the novel arrangement, construction and combination of parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my improved brake-shoe, I wlll describe the same more fully, referring to the accompanying sheet of drawings, in which:

Figure l is a plan or back View of a brakeshoe embodying my invention;

Fig. 2 is a side elevation, partly in section of the same Fig. 3 is a bottom plan view of the shoe; Fig. 4 is an end new of the shoe; V Fig. 5 is a cross-section of the shoe on the line V-V, Fig. 2;. and

Fig. 6 is a sectional view showing another form of the shoe.

Like symbols of reference herein lndicate like parts in each of the figures of the sheet of drawings.

' As illustrated in the figures of the drawings my improved brake-shoe is shown at a and has the usual shape or curvature, such Specification of Letters Patent.

Patented Aug. 10, 1920. Serial No. 317,748.

shoe being provided with an inclosing casing or cap or supporting member 1 and a frictionalfilhng or body member 2 of frictional material inserted in said casing or cap in any suitable manner. This filling member 2 is adapted to engage with the wheel and the rubbing or frictional action of the brakeshoe upon the wheel is exerted by such frictional member, which consists of any suitable material, such as cast iron or composition of matter or other material secured within the casing or cap 1 to exert proper and suflicient friction upon the periphery of the wheel without the imposition of undue or excessive wear thereon and the loss of wheel metal consequent thereto, and such compositions are of a character familiar to those skilled in the art.

The casing or cap 1 is formed from any suitable material, preferably from band, sheet, plate or other metal having a substantial degree of strength and durabilitv, such as malleable, wrought or other steel or iron, and when formed from sheet or plate metal it is pressed or bent by suitable dies into structure having an integral back wall 3, side lips 4 and end walls 5, as well as being open at the front for the insertion of the filling member 2 and curved substantially in accordance with the periphery of the car wheel on which the brake-shoe is to be used. The end walls 5 are slightly recessed at their inner ends, as at 5, and this with the short side lips 4 allows for providing the deep corners l on the casing 1 between such walls and lips to support the filling member 2 and plates 9.

The usual supporting lug 6 is connected or fixed to the back 3 of the casing or cap 1 in any suitable manner for connecting the shoe a to the Master Car Builders standard brake-head or hanger (not shown) and is preferably separate therefrom, as shown, by having the inner ends 8 passed through slots 8 in said back and turned against the inner face of the same to connect said lug to said casing. Short bearing surfaces 7 are formed adjoining the ends on the back 3 of the casing or cap 1 which are adapted to bear against bearings on the ends of the brakehead or hanger, and such bearings are preferably recessed, as at 7 Central or intermediate bearings on the head or hanger are adapted to abut against said back wall 3 of the casing or cap 1 and on each side of the lug 6.

flush with the exterior In the formation of the brake-shoe a, after the metallic cap orcasing 1 is formed, with the lug 6 connected to the back.3 in any suitable manner or as described, then the side pieces or plates 9 are inserted within the casing and then the material composing the filling member 2 is inserted in such casing or cap. These side pieces or plates 9 when so placed within the casing or cap 1 and against the fillin member 2 will form the side walls of the finished shoe a and assist with such casing or cap in holding the material comprising such member in place, and such pieces or plates are made of any convenient relatively softer material, what is commonly known as vulcanized fiber having been found satisfactory in practical use. The side pieces or plates 9 can be formed of different thicknesses, and if desired of the same thickness as the side lips l on the casing or cap 1,,so that their exterior surfaces surfaces of said'lips shall strictly conform in shape and size to the Master Car Builders standards; and in order to hold such plates against said lips and allow such fiush surfaces to be obtained, the plates are provided with a turned or bent portion 10 at their inner or upper edges which forms seats 11 for lower orouter end edges of said lips.

If desired, the side pieces or plates 9 can be formed of a thicker material than the end and side lips on the shoe, as shown in Fig.

6,-inwhich case the upper or inner portion of such shoe can be cut away to form the recesses 12 for the reception of the lower or 'outerend edges of such lips, and such inner portion can extend up along the interior surface of said side lips and against the interior surface of the back 3 on the casing or cap 1. 7

Various other fmodifications and changes inthe design and construction of my im- I I specification.

a which will notv melt proved brake-shoe may be resorted to, without departing from the spirit of the invention or sacrificing any of its advantages.

In theuse of the term soft in the above 7 and in the claims it will be understood that the material used for the sideplates or pieces of the brake-shoe, will .be flexible and resilient and is of such a nature as to be worn away itself by friction rather than cause, the wearing awayof the wheel to which the. brake-shoe isapplied, while such-term also ncludes such material from the heat of? such wheel on, high-speed passenger trains, and

thereby form a tempered or hard material as will, tend to, cut into and injure such wheel. It hasbeen found that the same raw stock as the regular vulcanized fiber when formedfto shape will answer the purposes desired;

It will thus be seen that my improved brake-shoe will prevent any possibility of' the reception of the r injury to or the uneven wearing of the wheel evenly, uniformly and together, while such form of shoe will also avoid any excessive wear on the wheel by the ends and sides of the shoe and enable a strong and durable inclosure to be formed for the filling material. The form of the casing or cap employed will also 'do away withwaste and scrap material during the process of manufacture, thereby making a saving in'the cost of such shoe.

s It will also be seen that in the use of my improved brake-shoe, the metal of the casing willbe kept from engaging with the wheel, so that the shoe can be used until it is worn down to such metal, thereby enabling only a small" portion of such shoe to remain after being used to the limit, so that it can be scrapped without any great loss in the material composing the shoe,

while the sides of the filling member will also beprotected by the side plates and such plates will assist the 'cap or casing in holding the filling member in place, 7

jlVliat I claim as my invention and desire to secure by Letters Patent is:

i 1. A brake-shoe having a supporting memberand a filling member, and separate side supporting plates'formed of soft material and held by the co-action of the fill ing member and the supporting member, with the exterior surface of the side plates flush" with the outside surface of the supporting member.

2. A; brake-shoe having a supporting member and a filling member, and separate side supporting plates formed of soft material and supported by said filling member and by a seat formed at the junction of said plates and supporting member.

8. A brake-shoehaving a supporting member and a filling member, and separate side supporting plates formed of vulcanized fiber and; supported by said filling member and'by a seat formed atthe junction of said plates and supportingmember.

terial and supported in said side lips by said filling member and by a seat formed at the unction of said plates and supporting "member.

:5. A brake-shoe having'a-i supporting member and a filling member, said supporting member having side lips, and separate side supportingplates formed of vulcanized fiber and supported in said lips by said fillingflmember and by a seat formed at the junction of saidplates and supportingmember'. V i

6. A brake-shoe having a supporting member and a filling member, ing member having side lips, and separate side supporting plates formed of a soft material supported by said side lips and by said filling material, said lips and plates having their exterior surfaces flush with each other.

7 A brake-shoe having a supporting member and a filling member said supporting member having side lips, and separate side supporting plates formed of vulcanized fiber supported by said side lips and by said filling material, said lips and plates having their exterior surfaces flush with each other.

8. A brake-shoe having a supporting member and a filling member, said supporting member comprising a cap having an in tegral back and end and side lips, and separate side supporting plates formed of a soft material and supported in said side lips by said filling member and by a seat formed at the junction of said plates and supporting member.

9. A brake-shoe having a supporting member and a filling member, said supporting member having an integral back, ends and side lips, and separate side supporting plates formed of vulcanized fiber and supsaid supportported in said lips by said filling member and by a seat formed at the junction of said plates and supporting member.

10. A brake-shoe having a supporting member and a filling member, said supporting member having an integral back, ends and side lips, and separate side supporting plates formed of a soft material supported by said lips and by said filling member, said lips and plates having their exterior surfaces flush with each other.

11. A brake-shoe having a supporting member and a filling member, said supporting member having an integral back, ends and side lips, and separate side supporting plates formed of Vulcanized fiber supported by said lips and by said filling member, said lips and plates having their exterior sur faces flush with each other.

12. A brake-shoe having a supporting member and a filling member, said supporting member having an integral back, ends and side lips, and separate side supporting plates formed of a soft material and supported in said side lips by said filling mem ber and by a seat formed at the junction of said plates and supporting member, said lips and plates having their exterior surfaces flush with each other.

13. A brake-shoe having a supporting member and a filling member, said supporting member having an integral back, ends and side lips and separate side supporting plates formed of vulcanized fiber and supported in said lips by said filling member and by a seat formed at the junction of said plates and, supporting member, said lips and plates having their exterior surfaces flush with each other.

14. A brake-shoe having a supporting member and a filling member, and separate supporting plates formed of a soft material for protecting the exposed surfaces of said filling member and supported in said supporting member by said filling material and b a seat formed at the junction of said p ates and supporting member.

15. A brake-shoe having a supporting member and a filling member, and separate supporting plates formed of vulcanized fiber for protecting the exposed surfaces of said filling member and supported in said supporting member and by said filling material and by a seat formed at the junction of said plates and supporting member.

16. A brake-shoe having a supporting member and a filling member, said supporting member having lips thereon, and separate supporting plates formed of a soft material for protecting the exposed surfaces of said filling member and supported in said lips by said filling member and by a seat formed at the junction of said plates and supporting member.

17. A brake-shoe having a supporting member and a filling member, said supporting member having lips thereon, and separate supporting plates formed of vulcanized fiber for protecting the exposed surfaces of said filling member and supported in said lips and by a seat formed at the junction of said plates and supporting member.

In testimony whereof, I, the said WILLIAM GIBsoN, have hereunto set my hand.

J. M. GEOGHEGAN, J. N. COOKIE. 

